patch libdingaling to use next_tag instead of child

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@14624 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/libdingaling/src/libdingaling.c

@@ -1019,7 +1019,7 @@ static int on_commands(void *user_data, ikspak *pak)
 				}
 			}
 		}
-		xml = iks_child (xml);
+		xml = iks_next_tag(xml);
 	}